My IPv6 address is perfectly stable. It's up to the ISP to decide if they bully you into paying extra for a static network or not, but it's an implementation pr

My IPv6 address is perfectly stable. It's up to the ISP to decide if they bully you into paying extra for a static network or not, but it's an implementation problem. Same with IPv4 assignment, necessitating hacks like DynDNS. If you want stable local addressing, announce a ULA on your LAN. Not all routers support it, unfortunately, but you can announce a ULA from any device. Just don't announce your raspberry Pi as an outbound router. ULAs use SLAAC and will derive at least one IP address from your devices' MAC address. There's a chance of instability if you have devices with the same MAC addresses (there's detection for that problem but you end up with a race condition after a network reboot), but your network will probably break in other ways if you have such a setup.